1326894509 has 4 divisors (see below), whose sum is σ = 1348646940. Its totient is φ = 1305142080.

The previous prime is 1326894487. The next prime is 1326894533. The reversal of 1326894509 is 9054986231.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 61669609 + 1265224900 = 7853^2 + 35570^2 .

It is a cyclic number.

It is not a de Polignac number, because 1326894509 - 2¹⁶ = 1326828973 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1326894589) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10876124 + ... + 10876245.

It is an arithmetic number, because the mean of its divisors is an integer number (337161735).

Almost surely, 2^1326894509 is an apocalyptic number.

It is an amenable number.

1326894509 is a deficient number, since it is larger than the sum of its proper divisors (21752431).

1326894509 is an equidigital number, since it uses as much as digits as its factorization.

1326894509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21752430.

The product of its (nonzero) digits is 466560, while the sum is 47.

The square root of 1326894509 is about 36426.5632334427. The cubic root of 1326894509 is about 1098.8678458955.

The spelling of 1326894509 in words is "one billion, three hundred twenty-six million, eight hundred ninety-four thousand, five hundred nine".